Study on the catalytic degradation of Acid Orange 7 and the potential mechanism by ferrous-percarbonate

© 2022 Water Environment Federation.

Bibliographische Detailangaben
Veröffentlicht in:Water environment research : a research publication of the Water Environment Federation. - 1998. - 94(2022), 10 vom: 02. Okt., Seite e10796
1. Verfasser: Huang, Fengyun (VerfasserIn)
Weitere Verfasser: Wang, Huan, Ruan, Xinchao
Format: Online-Aufsatz
Sprache:English
Veröffentlicht: 2022
Zugriff auf das übergeordnete Werk:Water environment research : a research publication of the Water Environment Federation
Schlagworte:Journal Article Acid Orange 7 catalysis degradation mechanism ferrous percarbonate 2-naphthol orange Q1LIY3BO0U sodium percarbonate Z7G82NV92P mehr... Humic Substances Benzenesulfonates Azo Compounds Carbonates Water 059QF0KO0R Phthalimides Water Pollutants, Chemical
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245 1 0 |a Study on the catalytic degradation of Acid Orange 7 and the potential mechanism by ferrous-percarbonate 
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500 |a published: Print 
500 |a Citation Status MEDLINE 
520 |a © 2022 Water Environment Federation. 
520 |a Factors affecting the degradation of Acid Orange 7 (AO7) were evaluated and optimized when ferrous was used to catalyze percarbonate in the present study. The optimized conditions included the initial pH values ranging from 3 to 11 for AO7 solution, the initial level of AO7, sodium percarbonate (SPC), and Fe2+ . Some ions and natural organic materials, which commonly exist in natural water, were also tested to evaluate their potential impacts on the degradation of AO7. The degradation efficiency of AO7 was up to 95% under the optimized test conditions, where the ferrous/percarbonate/AO7 molar ratio was 15/10/1 in the 0.285 mmol/l AO7 aqueous solution. The presence of Cl- , SO4 2- , NO3 - , Na+ , and Mg2+ did not affect the removal of AO7. The addition of HCO3 - significantly inhibited its removal, even when the concentration of HCO3 - was low to 0.6 mmol/l. A slight inhibition effect was observed when the added concentration of humic acid ranged from 0.5 to 5 mg/l, whereas the residue of AO7 was significantly enhanced when the level of humic acid was continually increased from 50 to 100 mg/l. Hydroxyl radicals (•OH) were the main reactive intermediates controlling the oxidation of AO7 in the present Fe2+ /SPC system. The produced intermediates through the degradation of AO7 were identified to include 2-coumaranone, 2-naphthol, phthalic acid, phthalimide, N-methylnaphthylamine, and 2-methylphenol. The proposed degradation pathways are consistent with the radical formation and the identified intermediates. PRACTITIONER POINTS: The ferrous/percarbonate system can remove 95% of AO7 under the optimized conditions. AO7 removal was inhibited by adding HCO3 - and humic acid, but not affected by Cl- , SO4 2- , NO3 - , Na+ , and Mg2+ . Hydroxylation, ring opening, and mineralization driven by the generated hydroxyl radicals were derived as the major processes for degrading AO7 
650 4 |a Journal Article 
650 4 |a Acid Orange 7 
650 4 |a catalysis 
650 4 |a degradation mechanism 
650 4 |a ferrous 
650 4 |a percarbonate 
650 7 |a 2-naphthol orange  |2 NLM 
650 7 |a Q1LIY3BO0U  |2 NLM 
650 7 |a sodium percarbonate  |2 NLM 
650 7 |a Z7G82NV92P  |2 NLM 
650 7 |a Humic Substances  |2 NLM 
650 7 |a Benzenesulfonates  |2 NLM 
650 7 |a Azo Compounds  |2 NLM 
650 7 |a Carbonates  |2 NLM 
650 7 |a Water  |2 NLM 
650 7 |a 059QF0KO0R  |2 NLM 
650 7 |a Phthalimides  |2 NLM 
650 7 |a Water Pollutants, Chemical  |2 NLM 
700 1 |a Wang, Huan  |e verfasserin  |4 aut 
700 1 |a Ruan, Xinchao  |e verfasserin  |4 aut 
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773 1 8 |g volume:94  |g year:2022  |g number:10  |g day:02  |g month:10  |g pages:e10796 
856 4 0 |u http://dx.doi.org/10.1002/wer.10796  |3 Volltext 
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